BR9611974A - Deslignificação de oxigênio de pasta fluida de polpa de consistência média. - Google Patents

Deslignificação de oxigênio de pasta fluida de polpa de consistência média.

Info

Publication number
BR9611974A
BR9611974A BR9611974-8A BR9611974A BR9611974A BR 9611974 A BR9611974 A BR 9611974A BR 9611974 A BR9611974 A BR 9611974A BR 9611974 A BR9611974 A BR 9611974A
Authority
BR
Brazil
Prior art keywords
slurry
oxygen gas
pulp slurry
oxygen delignification
reacting
Prior art date
Application number
BR9611974-8A
Other languages
English (en)
Inventor
William J Miller
Original Assignee
Beloit Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24278584&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BR9611974(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of BR9611974A publication Critical patent/BR9611974A/pt

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Packages (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Patente de Invenção para <B>"DESLIGNIFICAçãO DE OXIGêNIO DE PASTA FLUIDA DE POLPA DE CONSISTêNCIA MéDIA"<D>. A invenção descreve um processo de deslignificação de oxigênio de pasta fluida de polpa de consistência média, que inclue as etapas de proporcionar uma pasta fluida de polpa de aproximadamente dez por cento a desesseis por cento de consistência, a uma temperatura de aproximadamente 170oF-240oF, preferivelmente de 190 a 220oF, através de impregnação da pasta fluida com gás oxigênio e com álcali, para trazer a pasta fluida a um pH de pelo menos 11, mais preferivelmente 12, introduzindo-se a pasta fluida no gás oxigênio em um misturador de alto cisalhamento, para mistura por agitação no mesmo, reagindo a pasta fluida em um primeiro reator pressurizado entre 5 a 10 minutos, retornando o pH da pasta fluida para pelo menos 11, mais particularmente 12, com uma concentração de álcali residual de pelo menos 1,25, através da impregnação da pasta fluida com H~ 2~O~ 2~ e gás oxigênio, e reação da pasta fluida em um segundo reator entre 30 a180 minutos. Empregando-se somente o peróxido de hidrogênio durante de alvejamento inferior, um número Kappa inferior com alta %ISO é obtido nestas características benéficas, sendo retidos nas etapas de processamento subsequentes.
BR9611974-8A 1995-12-07 1996-11-13 Deslignificação de oxigênio de pasta fluida de polpa de consistência média. BR9611974A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57018095A 1995-12-07 1995-12-07
PCT/US1996/020955 WO1997027358A2 (en) 1995-12-07 1996-11-13 Oxygen delignification of medium consistency pulp slurry

Publications (1)

Publication Number Publication Date
BR9611974A true BR9611974A (pt) 1999-11-03

Family

ID=24278584

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9611974-8A BR9611974A (pt) 1995-12-07 1996-11-13 Deslignificação de oxigênio de pasta fluida de polpa de consistência média.

Country Status (10)

Country Link
US (2) US5916415A (pt)
EP (1) EP0866895B1 (pt)
CN (1) CN1203643A (pt)
AT (1) ATE193912T1 (pt)
BR (1) BR9611974A (pt)
CA (1) CA2239876A1 (pt)
DE (1) DE69608910T2 (pt)
ID (1) ID16178A (pt)
WO (1) WO1997027358A2 (pt)
ZA (1) ZA9610276B (pt)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866895B1 (en) * 1995-12-07 2000-06-14 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
DE19751173A1 (de) * 1997-11-19 1999-05-27 Voith Sulzer Papiertech Patent Verfahren zur Erhöhung des Weißgrades von Papierfaserstoff
BR0002634A (pt) * 1999-06-14 2001-01-02 Praxair Technology Inc Processo para tratar poupa lignocelulósica
SE522593C2 (sv) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech System och förfarande för syragasdelignifiering av massa av lignocellulosahaltigt material
AU2003209591A1 (en) * 2002-02-22 2003-09-09 Gilles Gervais Process of treating lignocellulosic material to produce bio-ethanol
EP1375734A1 (en) * 2002-06-17 2004-01-02 SCA Hygiene Products GmbH Bleached, strong sulfite chemical pulp, a process for the production thereof and products derived therefrom
SE526000C2 (sv) * 2003-11-26 2005-06-14 Kvaerner Pulping Tech Metod och system för att styra tillsättning av syrgas och alkali vid syrgasdelignifiering
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge
CN100400744C (zh) * 2006-05-26 2008-07-09 华南理工大学 中浓纸浆稳压双升流塔氧气漂白方法
CN103757955B (zh) * 2014-01-06 2016-08-24 南京林业大学 一种改进碱性过氧化氢机械浆工艺提高纸浆强度的新方法
US20160002858A1 (en) * 2014-07-03 2016-01-07 Linde Aktiengesellschaft Methods for the oxygen-based delignification of pulp
CN104452395A (zh) * 2014-11-04 2015-03-25 中国轻工业南宁设计工程有限公司 一种应用于蔗渣制浆的氧脱木素方法及设备
SE540043C2 (en) * 2015-11-27 2018-03-06 Valmet Oy Method and system for oxygen delignification of cellulose pulp

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI45574C (fi) * 1970-05-11 1972-07-10 Kymin Oy Kymmene Ab Menetelmä selluloosapitoisten aineiden valkaisemiseksi.
US3719552A (en) * 1971-06-18 1973-03-06 American Cyanamid Co Bleaching of lignocellulosic materials with oxygen in the presence of a peroxide
SE379069B (pt) * 1973-08-27 1975-09-22 Kamyr Ab
US3951733A (en) * 1974-11-06 1976-04-20 International Paper Company Delignification and bleaching of wood pulp with oxygen
US4198266A (en) * 1977-10-12 1980-04-15 Airco, Inc. Oxygen delignification of wood pulp
DE3207157C1 (de) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung von halbgebleichten Zellstoffen
FR2566015B1 (fr) * 1984-06-15 1986-08-29 Centre Tech Ind Papier Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene
US4946556A (en) * 1989-04-25 1990-08-07 Kamyr, Inc. Method of oxygen delignifying wood pulp with between stage washing
US5034095A (en) * 1989-06-01 1991-07-23 Oji Paper Co., Ltd. Apparatus and process for the delignification of cellulose pulp
FR2655668B1 (fr) * 1989-12-11 1995-06-09 Du Pin Cellulose Procede de blanchiment de pates cellulosiques chimiques.
US5211809A (en) * 1991-05-21 1993-05-18 Air Products And Chemicals, Inc,. Dye removal in oxygen color stripping of secondary fibers
US5389201A (en) * 1992-02-28 1995-02-14 International Paper Company Bleaching of kraft cellulosic pulp employing ozone and reduced consumption of chlorine containing bleaching agent
ZA947310B (en) * 1993-09-22 1995-05-10 Ingersoll Rand Co Method of and apparatus for oxygen delignifiation of medium consistency pulp slurry
SE502172C2 (sv) * 1993-12-15 1995-09-04 Mo Och Domsjoe Ab Förfarande för framställning av blekt cellulosamassa med en klorfri bleksekvens i närvaro av karbonat
EP0866895B1 (en) * 1995-12-07 2000-06-14 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry

Also Published As

Publication number Publication date
ID16178A (id) 1997-09-11
WO1997027358A2 (en) 1997-07-31
US6080275A (en) 2000-06-27
EP0866895A2 (en) 1998-09-30
DE69608910D1 (de) 2000-07-20
EP0866895B1 (en) 2000-06-14
CA2239876A1 (en) 1997-07-31
ATE193912T1 (de) 2000-06-15
WO1997027358A3 (en) 1997-10-02
CN1203643A (zh) 1998-12-30
DE69608910T2 (de) 2001-01-18
US5916415A (en) 1999-06-29
ZA9610276B (en) 1997-07-30

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Legal Events

Date Code Title Description
EG Technical examination (opinion): publication of technical examination (opinion)